KR101756271B1 - Apparatus for measuring stages of ground water and surface water based on magnetostriction and multi-measurment system using the same - Google Patents

Apparatus for measuring stages of ground water and surface water based on magnetostriction and multi-measurment system using the same Download PDF

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KR101756271B1
KR101756271B1 KR1020140151996A KR20140151996A KR101756271B1 KR 101756271 B1 KR101756271 B1 KR 101756271B1 KR 1020140151996 A KR1020140151996 A KR 1020140151996A KR 20140151996 A KR20140151996 A KR 20140151996A KR 101756271 B1 KR101756271 B1 KR 101756271B1
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South Korea
Prior art keywords
level
water
groundwater
surface water
sensor
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KR1020140151996A
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Korean (ko)
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KR20160053393A (en
Inventor
석희준
고동찬
한장희
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한국지질자원연구원
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Priority to KR1020140151996A priority Critical patent/KR101756271B1/en
Priority to US14/597,373 priority patent/US9618380B2/en
Priority to CN201510096626.1A priority patent/CN105987740A/en
Publication of KR20160053393A publication Critical patent/KR20160053393A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
    • G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/159—Generating seismic energy using piezoelectric or magnetostrictive driving means

Abstract

The present invention relates to a sensor for measuring the level of groundwater and surface water using magnetostrictive displacement and a multi-measurement system for groundwater and surface water.
The level sensor of the present invention comprises: an outer case having a hollow inside and extending in the longitudinal direction; A pendulous line spaced apart from the inner wall in the hollow of the outer case and extending in the longitudinal direction; A floating permanent magnet which is guided along the natural line and is installed to be able to flow in the longitudinal direction and whose position is variable corresponding to the water level of the water surface; And a second magnetic field formed in the circumferential direction of the pendulum by the current pulse and a second magnetic field formed in the axial direction of the pendulum by the permanent magnet are generated And a transmission / reception unit for receiving the elastic waves.

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a groundwater and surface water level sensor using a magnetostrictive displacement and a multi-measurement system of groundwater and surface water using the same,

The present invention relates to an apparatus and a system for efficiently measuring a water level using a magnetostrictive displacement.

Hydrologic cycle refers to the continuous movement of water over the surface, below the surface, and above the surface. Water on the surface - surface water - exists in the form of rivers, lakes, wetlands, gulfs, and oceans, and can also exist in the form of snow and glaciers. Water present below the surface is groundwater, and soil water is also contained in the groundwater. However, it is relatively easy to model the movement of water over the atmosphere and surface, but it is very difficult in case of groundwater movement. The groundwater flows along different paths from the canopy to the discharge ground. Generalization of groundwater flow starts from underground water, runs along the groundwater system, and ends in the river or pumice. Groundwater recharge begins when precipitation penetrates through the unsaturated zone. The free-surface aquifer, which is the top of the aquifer, has a flow of several tens to several hundreds of feet, and the time required is several days to several years.

In some circumstances, gain and loss streams may persist. In other words, some rivers are always supplied with groundwater from underground water systems, while other rivers are always supplying water to groundwater systems. In other environments, along a river, it becomes a lost river in some areas and in some areas it becomes a gain river. In addition, there are alternating gain and loss streams in a very small range due to focused recharge, temporary overflow, and groundwater evaporation by the riparian plant. In other words, groundwater and surface water systems always have complex interactions.

There is a phenomenon called bank storage as an interaction between groundwater and surface water in almost all rivers. The river bank reservoir is a phenomenon that river water is moved to the riverbank and stored as the river water level becomes higher than the surrounding ground water level due to the sudden rising of the river water level. Riverbank reservoirs can occur when sudden precipitation or rapid snow melting or sudden water ingress from an upstream reservoir. In this case, if the river level does not increase continuously, the water stored on the river bank returns to the river within a few days to several weeks. If the river level floods over river banks, a large-scale groundwater recharge will occur over the entire flooded area. If groundwater recharge occurs due to flooding, it can take weeks, months or even years to return to the river again.

Therefore, it is necessary to develop a sensor that accurately measures the surface water level and groundwater level, and to develop a system for monitoring the correlation between these sensors.

The inventor of the present invention has endeavored for a long time to solve this problem, and finally completed the present invention.

It is an object of the present invention to provide a sensor capable of measuring the water level of surface water or ground water.

Another object of the present invention is to provide a multi-sensor capable of simultaneously measuring the surface water level and the ground water level.

It is still another object of the present invention to provide a measurement system capable of measuring the level of surface water and groundwater and monitoring their correlation.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

In order to accomplish the above object, according to a first aspect of the present invention, there is provided a sensor for measuring groundwater level and surface water level using a magnetostrictive displacement, comprising: an outer case having a hollow inside and extending in the longitudinal direction; A pendulous line spaced apart from the inner wall in the hollow of the outer case and extending in the longitudinal direction; A floating permanent magnet which is guided along the natural line and is installed to be able to flow in the longitudinal direction and whose position is variable corresponding to the water level of the water surface; And a second magnetic field formed in the circumferential direction of the pendulum by the current pulse and a second magnetic field formed in the axial direction of the pendulum by the permanent magnet are generated And a transmission / reception unit for receiving the elastic waves.

In a preferred embodiment, the outer case of the sensor for measuring the groundwater level and the surface water using the magnetostrictive displacement of the present invention includes a storage tube for storing the magnetic pendulum and the floating permanent magnet; And a sharp-pointed tip portion provided at a lower end of the storage tube and having a smaller diameter toward the distal end.

In a preferred embodiment, the outer case of the sensor for measuring the groundwater level and the surface water level using the magnetostrictive displacement of the present invention may include at least one or more water holes for allowing groundwater or surface water to flow into the outer case.

In an exemplary embodiment, the outer case of the sensor for measuring the groundwater level and the surface water level using the magnetostrictive displacement of the present invention may include a position-fixed permanent magnet fixed to the pendulum at an end of the outer case.

According to a second aspect of the present invention, there is provided a multi-measurement system for a groundwater level and a surface water level using a magnetostrictive displacement according to the second aspect of the present invention includes a water level measuring sensor according to any one of claims 1 to 4, A first level sensor mounted so that the first floating permanent magnet floats on the surface of groundwater; The level sensor according to any one of claims 1 to 4, wherein the level sensor measures the level of the surface water, the second level sensor being installed so that the second floating permanent magnet floats on the surface of the surface water; A controller for measuring the level of the groundwater by measuring the elastic wave transmitted from the first floating permanent magnet and measuring the level of the surface water by measuring the elastic wave transmitted from the second floating permanent magnet; And a monitoring server monitoring the level data of the ground water and the surface water according to a predetermined period.

In a preferred embodiment, in the multi-measurement system for groundwater level and surface water level using the magnetostrictive displacement of the present invention, the first pointed portion formed at the distal end of the first level measurement sensor is fixed to the bottom surface of the groundwater, The second pointed portion formed at the distal end of the groundwater can be fixed to the bottom surface of the surface water.

In a preferred embodiment, the outer case of the first level measuring sensor and the second level measuring sensor of the multi-measurement system for the groundwater level and the surface water level using the magnetostrictive displacement of the present invention includes at least And may include one or more water holes.

In a preferred embodiment, the outer case of the first level measuring sensor of the multi-measurement system of groundwater and surface water level using the magnetostrictive displacement of the present invention comprises a storage tube for storing the magnetic field and the floating permanent magnet; And a pointed tip portion provided at a lower end of the accommodating tube and having a smaller diameter toward the distal end, wherein the lower end portion or the apical portion of the accommodating tube has at least one or more water holes for allowing groundwater to flow into the outer case .

According to the present invention as described above, it is possible to accurately measure not only the surface water but also the water level of the ground water. In particular, even if groundwater flows under the surface water, the sensor can be installed through the bottom surface of the surface water. The outer case of the sensor is formed as a pipe and can be installed through the bottom surface of the surface water. Since the floating permanent magnet can freely flow inside the pipe, it is easy to measure the ground water. A water hole is formed at one end of the outer case. Since the groundwater can be introduced through the water hole, the water level of the groundwater can be accurately measured.

In addition, according to the present invention, since a sensor for measuring surface water and a pair of sensors for groundwater measurement can be installed at the same point, the correlation between surface water and ground water can be clearly grasped.

Further, according to the present invention, there is an effect that the water level of the surface water and that of the ground water can be measured at the same time, and the mutual relationship between the surface water and the ground water is monitored.

On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view schematically showing an embodiment of a sensor for measuring the level of ground water and surface water using the magnetostrictive displacement of the present invention. FIG.
FIG. 2 is a view schematically showing one embodiment of a tip portion included in a sensor for measuring the level of groundwater and surface water using the magnetostrictive displacement of the oil storage tank of the present invention.
3 is a view schematically showing the principle of operation of a sensor for measuring the level of groundwater and surface water using the magnetostrictive displacement of the present invention.
4 is a view for explaining a method of measuring the water level in a sensor for measuring the level of groundwater and surface water using the magnetostrictive displacement of the present invention.
5 is a diagram schematically showing an embodiment of a multi-measurement system for groundwater level and surface water level using the magnetostrictive displacement of the present invention.
6 is a view schematically showing an installation example of a multi-measurement system for groundwater level and surface water level using the magnetostrictive displacement of the present invention.
It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view schematically showing an embodiment of a sensor for measuring the level of ground water and surface water using the magnetostrictive displacement of the present invention. FIG.

1, the sensor 100 for measuring the groundwater level and the surface water level using the magnetostrictive displacement may include an outer case 110, a pendulum 120, a floating permanent magnet 130, and a transceiver 140 have.

The outer case 110 is a pipe-shaped case having a hollow inside and extending in the longitudinal direction. A magnetic pinhole 120 is provided in a longitudinal direction at the center of the outer case 110 and a floating permanent magnet 130 is movably disposed along the magnetic pinhole 120.

The outer case 110 may include a receiving head 111, a receiving tube 113, and a tip 115. The receiving head 111 houses the transceiver 140 and can be watertight to prevent moisture from penetrating from the outside. The storage tube 113 is a tube having a hollow inside and extending long in the longitudinal direction. The storage head 111 may be coupled to one end and the tip 115 may be coupled to the other end. Since the storage tube 113 has a diameter larger than the diameter of the floating permanent magnet 130, the floating permanent magnet 130 can move along the storage tube 113 in the longitudinal direction. The tip end portion 115 is provided at the lower end of the storage tube 113 and has a pointed shape with a diameter becoming narrower towards the distal end. An inclined surface, such as a wedge of the tip 115, facilitates digging into the bottom surface of the stream or the bottom surface of the groundwater.

The magnetic core 120 is formed to extend in the longitudinal direction away from the inner wall in the hollow interior of the outer case 110. The magnetic field line 120 may include a steel wire 121 to which a current is applied and a protective tube 123 surrounding the steel wire 121. In this document, the parasitic element 120 is a probe that can include the wire 121 and the protective tube 123. The probe 121 is a wire that is electrically connected to the wire 121, It is defined as meaning.

The protective tube 123 is made of a material that does not shield the magnetic field generated by the steel wire 121. Groundwater or surface water flows into the outer case 110, and the floating permanent magnet 130 flows in accordance with the water level. At this time, the protection tube 123 functions to prevent leakage of current flowing through the steel wire 121 by ground water or surface water.

The floating permanent magnet 130 is guided along the magnetic field line 120 so as to be able to flow in the longitudinal direction, and its position is varied corresponding to the water level by the buoyant force. To this end, the floating permanent magnet 130 includes a buoyant material that provides buoyancy to allow the permanent magnet and the permanent magnet to float on the surface of the water. In one embodiment, the floating permanent magnet 130 has a through hole formed at its center so that the magnetic pin 120 can penetrate through the through hole. The diameter of the through hole is larger than the diameter of the pyramid 120 so that the floating permanent magnet 130 can freely flow along the magnetic field line 120.

The transmitting and receiving unit 140 applies a current pulse to the pseudo-pulse 120 and generates a current through the first magnetic field formed in the circumferential direction of the pseudo-pulse 120 by the current pulse, And a second magnetic field formed in the direction of the axis of the second magnetic field. The transceiver 140 includes a circuit cover 143 that can be installed inside the receiving head 111 formed at the upper end of the outer case and protects the transceiver circuit 141 and the transceiver circuit 141 from moisture or the like .

Meanwhile, although not shown, the outer case may include a fixed permanent magnet fixed to the pendulum 120 at the outer case end. In the preferred embodiment, the stationary permanent magnet may be fixed between the housing tube 113 and the tip portion 115.

Use of the permanent magnet in place of the floating permanent magnet 130 has the effect of reducing the occurrence of errors due to changes in external environmental factors (for example, temperature). Hereinafter, a specific error correction method will be described.

Since the fixed position permanent magnet is fixed to the distal end of the pendulum 120, the actual distance L to the transducer 140 can be known in advance. The measurement distance L 'derived from the propagation time of the ultrasonic wave between the transmission and reception unit 140 and the position-fixed permanent magnet and the measurement distance L' derived from the transmission and reception unit 140 and the floating permanent magnet 130 (1 ') derived from the propagation time of the ultrasonic waves between the ultrasonic wave propagating in the ultrasonic wave propagating in the ultrasonic wave.

Through the measurement distance values (L ', I') thus constructed, the displacement value with respect to the measurement object to which the measurement error is compensated can be obtained through the following calculation method.

That is, the measurement distance value L 'derived from the propagation time of the ultrasonic wave between the transmission / reception unit 140 and the position-fixed permanent magnet is divided by the actual distance value L between the transmission / reception unit 140 and the position- And the reference position change rate Y is calculated from the measured distance value I 'derived from the propagation time of the ultrasonic wave between the transmitting and receiving unit 140 and the floating permanent magnet 130, The displacement value (1) for the object to which the error is compensated can be obtained by multiplying the value (1 ') by an inverse number.

The formula for this can be expressed as follows.

(1)

Y = L '/ L

l = l '(1 / Y)

The displacement value with respect to the measurement object of the water level sensor can be corrected using Equation (1) derived as described above.

FIG. 2 (a) is a view schematically showing one embodiment of a tip portion included in a sensor for measuring the level of groundwater and surface water using the magnetostrictive displacement of the oil storage tank of the present invention, and FIG. 2 (b) 1B is a view showing the AA 'cross section shown in a).

As can be seen in FIG. 2, the tip portion 115 has a pointed shape having a smaller diameter toward the distal end, and may include a wedge-shaped inclined surface.

The tip portion 115 may include at least one water hole 117 for allowing ground water or surface water to flow into the outer case. As shown in FIG. 2 (a), the plurality of the water hole 117 may be spaced apart from each other at a predetermined interval in the longitudinal direction. 2 (b), the eutectic holes 117 may be formed in a plurality of rows in the longitudinal direction.

In another embodiment, the water hole 117 may be formed in the storage tube of the outer case. The water hole 117 concentrates the fluid pressure potential, that is, the water underground water and the surface water head, at the lower end portion of the receiving pipe so as to be distributed at the position to be measured. At this time, the arrangement of the water holes is evenly distributed, so that the interaction with the fluid in all directions can be performed. The number of water holes is determined inversely with the permeability of the surrounding lipid media. If the lipid medium has sufficient permeability, it is not necessary to have a large number of water holes, but it is better to increase the number of water holes possible in low permeability regions such as clay layers. Also, the size of the water hole should be as small as possible to prevent the surrounding lipid media from flowing into the containment tube, but should be large enough so that the surrounding fluid is not disturbed by the friction losses. Therefore, the size of the water hole is determined in proportion to the size of the surrounding unconsolidated material.

If the water hole 117 is formed at the upper end of the storage pipe, the ground water or the surface water may not flow into the outer case when the fluid level (ground water and surface water) is lower than the upper end of the storage pipe. In addition, if the water hole 117 is not formed at the lower end of the storage tube, note that water level may not be measured because the water that has flowed into the outer case does not escape when the water level falls.

When the ground water or the surface water flows into the outer case through the water hole 117, the surface of the inside of the outer case and the surface of the outer fluid become equal due to the hydrostatic principle. Therefore, by measuring the height at which the floating permanent magnet in the outer case floats, the height of the water surface outside the outer case can be known.

FIG. 3 is a view schematically showing the principle of operation of a sensor for measuring the level of groundwater and surface water using the magnetostrictive displacement of the present invention, and FIG. 4 is a view for explaining the operation of the sensor for measuring the level of groundwater and surface water using the magnetostrictive displacement of the present invention Fig.

3 and 4, according to the present invention, the current pulse generated in the transceiver 140 generates a magnetic field in the circumferential direction of the magnetic field 120, and generates a magnetic field in the up and down direction The floating permanent magnet 130 moving to the magnetic field 120 generates an axial magnetic field.

Accordingly, the magnetic field in the circumferential direction generated in the magnetic field 120 and the magnetic field in the axial direction generated in the floating permanent magnet 130 cross each other to induce a synthetic magnetic field (indicated by a hidden line). At this time, the synthetic magnetic field is propagated to the pseudo line 120 by an ultrasonic wave (elastic wave) which is a mechanical vibration wave, and thereby a torsional distortion is generated.

Using this principle, the distance L between the transmitting and receiving unit 140 and the floating permanent magnet 130 can be measured through the sensor configuration shown in FIG. That is, a reflected wave is generated at the position of the floating permanent magnet 130 from the propagation time of the ultrasonic wave propagated along the pseudo-pulse 120, that is, the time when the current pulse is applied from the transceiver 140, And the distance between the transmitting and receiving unit 140 and the floating permanent magnet 130 can be measured by converting the measured time to a distance. The measurement data may be transmitted via the cable 150 to the controller. In one embodiment, cable 150 may be a cable conforming to a communication standard such as RS-485.

Since the floating permanent magnet 130 floats according to the height of the water surface, the water level of the ground water or the surface water can be measured from the distance between the transmission and reception unit 140 and the floating permanent magnet 130.

5 is a diagram schematically showing an embodiment of a multi-measurement system for groundwater level and surface water level using the magnetostrictive displacement of the present invention.

5, the multi-measurement system 10 of the present invention includes a first level measuring sensor 100a, a second level measuring sensor 100b, a controller 200, and a monitoring server 300. As shown in FIG.

The first level sensor 100a is a level sensor for measuring the level of groundwater. The first level sensor 100a is a level sensor for measuring the level of groundwater. The first level sensor 100a is a level sensor for measuring the level of groundwater. And a first floating permanent magnet. The first pointed tip portion may be provided at the distal end of the first level measuring sensor so as to easily penetrate the bottom surface of the surface water.

On the other hand, a water hole is formed in the outer case of the first level sensor 100a so that groundwater can be introduced into the interior. In one embodiment, since the upper end of the outer case of the first level sensor 100a is immersed in the surface water, when the water hole is formed at the upper end of the outer case 100a, So that the level of groundwater can not be accurately measured. Therefore, the water hole of the first level measuring sensor 100a should be disposed at the lower end of the first pointed portion, which is a position corresponding to the pressure potential of the groundwater fluid at least below the bottom surface of the surface water.

The second level sensor 100b is a level sensor for measuring the level of the surface water, and the second floating permanent magnet is installed to float on the surface of the surface water. The second pointed portion formed at the distal end of the second level sensor 100b may be fixed to the bottom surface of the surface water. Since the surface water is shallower than the groundwater, the length of the second level sensor 100b may be shorter than that of the first level sensor. The second level sensor 100b may have a depth of 1m or less, but the present invention is not limited thereto.

The controller 200 measures the level of the groundwater by measuring the elastic wave transmitted from the first floating permanent magnet and measures the level of the surface water by measuring the elastic wave transmitted from the second floating permanent magnet. The controller 200 may provide a user interface for graphically displaying the measured level. The measured water level is displayed on the controller screen, for example, at intervals of one minute, and the measured data is stored immediately. The controller 200 can store measurement data for one year. The wire connected from the controller 200 to the sensor can be installed in the SUS protective pipe. The SUS protective pipe can be buried 0.5 to 1 m below the ground to prevent loss.

The monitoring server (300) monitors the level data of the ground water and the surface water according to a preset cycle. The monitoring server 300 may be connected to the controller 200 via the Internet, wireless communication, or the like, and may receive measurement data of the controller 200. [ The monitoring server 300 may be able to sound an alarm at a sudden change in the water level of the ground water or surface water or in a situation other than that set (e.g., at a high water level, underground water depletion, etc.).

6 is a view schematically showing an installation example of a multi-measurement system for groundwater level and surface water level using the magnetostrictive displacement of the present invention.

The first level measuring sensor 100a is a level measuring sensor for measuring a level 310 of groundwater and is installed so that the first floating permanent magnet 130a floats on the surface 310 of groundwater. In a preferred embodiment, the first pointed portion formed at the distal end of the first level measuring sensor 100a may be fixed to the bottom surface of the groundwater. The first level sensor 100a may be installed by installing an outer case using 80 mm SUS at a depth of 3 m underground, but is not limited thereto.

The second level sensor 100b is a level sensor for measuring the level 320 of the surface water, and the second floating permanent magnet 130b is installed to float on the surface 320 of the surface water. The second pointed portion formed at the distal end of the second level sensor 100b may be fixed to the bottom surface of the surface water. Since the surface water is shallower than the groundwater, the length of the second level sensor 100b may be shorter than that of the first level sensor 100a. The second level sensor 100b may have a depth of 1m or less, but the present invention is not limited thereto.

The controller 200 measures the level 310 of the groundwater by measuring the elastic waves transmitted from the first floating permanent magnet 130a and measures the elastic waves transmitted from the second floating permanent magnet 130b to measure the level of the surface water 320) is measured. The controller 200 may be installed inside a box formed of, for example, 2.0T steel plate material. Since the controller box is installed outdoors, it is manufactured to withstand various weather conditions and can be fixedly mounted on a support made of concrete.

The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the present invention is not limited by the modifications or substitutions that are obvious to those skilled in the art.

Claims (13)

delete delete delete delete delete delete delete delete A multi-measurement system for groundwater and surface water levels to monitor the interrelation between surface water and ground water to prevent natural disasters:
1. A level sensor for measuring a level of groundwater, comprising: a first level sensor installed through a bottom surface of a surface water and installed so that a first floating permanent magnet floats on a surface of groundwater;
A level sensor for measuring the level of surface water, comprising: a second level sensor having a length shorter than a length of the first level measuring sensor, the second level floating sensor being provided to float the surface of the surface water;
A controller for measuring the level of the groundwater by measuring the elastic wave transmitted from the first floating permanent magnet and measuring the level of the surface water by measuring the elastic wave transmitted from the second floating permanent magnet to grasp the correlation between the surface water and the groundwater; And
And a monitoring server for monitoring the water level data of the ground water and the surface water according to a preset cycle,
The level measuring sensor comprises:
An outer case having a hollow inside and extending in the longitudinal direction;
A pendulous line spaced apart from the inner wall in the hollow of the outer case and extending in the longitudinal direction;
A floating permanent magnet which is guided along the natural line and is installed to be able to flow in the longitudinal direction and whose position is variable corresponding to the water level of the water surface; And
And a second magnetic field formed in the direction of the axis of the parietal line by the permanent magnet crosses the first magnetic field formed in the circumferential direction of the parietal line by the current pulse And a transmission / reception section for receiving the elastic wave,
Wherein an outer case of the first level measuring sensor is formed with a water hole at the lower end thereof so as to measure the pressure potential of the ground water fluid without forming a water hole at the upper end so as to prevent the surface water from flowing into the outer case. Multiple measurement system of groundwater and surface water level. 10. The method of claim 9,
The first pointed portion formed at the distal end of the first level measuring sensor is fixed to the bottom surface of the groundwater,
And a second pointed portion formed at an end of the second level measuring sensor is fixed to the bottom surface of the surface water.
Multi - measurement system of groundwater and surface water level using magnetostrictive displacement. The method of claim 9, wherein
Wherein the outer case of the first level measuring sensor and the second level measuring sensor includes at least one or more water holes for allowing ground water or surface water to flow into the outer case.
Multi - measurement system of groundwater and surface water level using magnetostrictive displacement. 10. The method of claim 9,
Wherein the outer case of the first level measuring sensor comprises: a storage tube for storing the magnetic pulse and the floating permanent magnet; And
And a pointed tip portion provided at a lower end of the accommodating tube and having a smaller diameter toward the distal end.
Multi - measurement system of groundwater and surface water level using magnetostrictive displacement. 13. The method of claim 12,
Wherein the lower end of the storage tube or the tip end includes at least one or more water holes for allowing groundwater to flow into the outer case.
Multi - measurement system of groundwater and surface water level using magnetostrictive displacement.
KR1020140151996A 2014-11-04 2014-11-04 Apparatus for measuring stages of ground water and surface water based on magnetostriction and multi-measurment system using the same KR101756271B1 (en)

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KR1020140151996A KR101756271B1 (en) 2014-11-04 2014-11-04 Apparatus for measuring stages of ground water and surface water based on magnetostriction and multi-measurment system using the same
US14/597,373 US9618380B2 (en) 2014-11-04 2015-01-15 Sensor for measuring water levels of groundwater and surface water using magnetostriction displacement and multi measurement system for groundwater and surface water by using the same
CN201510096626.1A CN105987740A (en) 2014-11-04 2015-03-04 Multi-measurement system and sensor for measuring underground water and surface water

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